Re: [tor-talk] Tor-Friendly Two-Factor Authentication?

[Allen <allenpmd@xxxxxxxxx>]

On Fri, Jun 10, 2016 at 9:58 PM, Scott Arciszewski <scott@xxxxxxxxxxxxx>
wrote:

> * FIDO U2F requires users to purchase separate hardware devices which,
> while cheap, aren't already in the arsenal of most netizens
>

How about developing a simple 2FA app for a smartphone?  Maybe a smartphone
could emulate a FIDO U2F?  Alternately, I remember some of the first 2FA
devices were fobs that displayed a 6 digit code that changed every 15
seconds or so, based a pseudorandom generator that had a secret seed value
that was known by the server.  A simple smartphone app design might be to
give the user a pseudorandom seed when they create their account, the user
inputs the seed into the app on their phone, and then when they want to
login they have to enter a 6-8 digit code displayed by their smartphone
app.  Maybe some apps like that already exist...
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